Extract details from web portal with looping criteria

Roll Number Example : 500001 , 500002,500002,500003,500004,500005,500006,500007,500008

I have website where i need to enter the numeric value and after submit -- the details of information comes out which i would need the information to capture as below.

REGISTRATION NO 500001 CANDIDATE NAME A HOSAMANIKENDAPPA

Roll Number ; 500006 - should show as it is come as in page (Please check the registration number and try again)
Loop/ Countering the roll number and capturing the results are my issues which is getting trouble.